Device for injecting viscous materials



April 17, 1945. J. A. MURNANE DEVICE FOR INJECTING VISCOUS MATERIALSFiled Aug. 31, 1945 2 Sheets-Sheet 1 iiiiiiiiii:

hue/0 w JE/m Nil/wane Ap i 17, 1945- J. A. MURNANE 2,373,774

DEVICE FOR INJECTING VISCOUS MATERIALS Filed Aug. 31, 1943 2Sheets-Sheet 2 Patented Apr. 17, 1945 DEVICE FOR INJECTING VISCOUSMATERIALS John A. Murnane,

Waterbury, -Conn., assignor'to Chase Brass & Copper 00. incorporated,Waterbury, 001111., a corporation Application August 31, 1943, SerialNo. 500,665

4 Claims.

The present invention relates to improvements in devices for injectingviscous or plastic materials under pressure into extraneous devices orlocations. The devices of the present invention are especially wellsuited for injecting or feeding packaged insulating or sealing materialinto the cavities in the spark plugs of aircraft engines, thoughavailable for many other uses where it is desired to inject viscousmaterials.

One of the objects of the present invention is to provide a superiordevice of the character referred to and having reliable and eifectivemeans whereby sealed packages of viscous materials may be installed inthe device and the contents of such package then expelled from thedevice and delivered to the desired location.

Another object of the present invention is to provide a superior deviceof the character referred to having reliable and efiective means wherebya sealed package of viscous material may be installed in the device andthe package suitably opened while in the device, followed by theexpulsion of the contents of the said package from both the package andthe device.

A further object of the present invention is to provide a superiordevice for injecting viscous material and having the general featuresset forth in either of the foregoing objects and, in addition, havingsuperior means whereby the viscous material may be prevented fromescaping in appreciable amount from the package other than through thedesigned and intended deliveryopening of the device.

Still another object of the present invention is to provide a superiordevice of the character referred to in which the contents of a packageof viscous or plastic material may be cleanly and substantiallycompletely removed from the package and expelled from the device to thedesired locations.

With the above and other objects in view, as will appear to thoseskilled in the art from the present disclosure, this invention includesall features in the said disclosure which are novel over the prior art.

In the accompanying drawings, in which certain modes of carrying out thepresent invention are shown for illustrative purpses:'

Fig. 1 is a view in side elevation of one form of a device for injectingviscous materials, embodying the present invention;

Fig. 2 is a broken view mainly in central-longitudinal section on theline 2-2 of Fig. 1 and partly in side elevation, a sealed package ofplastic material being shown within the device 56 and the parts of. thelatter assembled and in position just prior to the severance of theendwall of .the package;

Fig. 3 is a view similar to Fig. 2 but showing the feeding-head advancedinto the interior of the package;

Fig. 4 is a transverse sectional view taken on the line 4-4 .of Fi 2;

Fig. 5 is a. similar view, but taken '55 of Fig. 2;

vFig. 6 ,is a view partly inside elevation and partly incentral-longitudinal section of the unit comprising the inner cap,contractor, operatingrod and feeding-head, together with associatedparts:

Fig. 7 is .a perspective view of the contractor;

Fig 8 is .a similar view of the anchoringplate;

. Fig. .9 isa perspective view of the outlet-nipple; and

Fig. 10 is a perspective view of a sealed package .suitable for use inthe injecting device shown.

The particular device for feeding viscous or plastic materials hereinchosen for purposes of illustrating one form of .the present invention,includes a tubular body or barrel [5 which is externally threadedadjacent each of its respective opposite ends. Normally threadedlycOnnected to one end of the body I5 is an inner cap I6 and similarlyconnected at the opposite end of the said body is an outer cap ll.

The inner .cap l6 has rigidly projecting outwardly from it aninternally-threaded bushing 18 threa'dedly receiving .anexternally-threaded operating-rod 19. At its exposed end, theoperating-rod 1.9 has rigidly secured thereto a barlikehandle 20 and atits opposite end the said operating-rod has a feeding-head generallydesignated by the reference character 2| fixedly secured thereto.

The feeding-head 2| just above referred to includes a lower or outerclamping-washer 22 and an inner or upper clamping-washer 23 clampingbetween them a cup-washer 24 and a. cup-like expander 25. The saidcup-washer .24 may be formed of leather or other suitable flexiblematerial, while the said expander 25 may be formed of spring metal .soas to exert a constant effort to yielding'ly-urge the flange of thecup-washer 24 outwardly-in a generally radial direction. All of theelements 22 to 25 inclusive above referred to are mounted upon a .stem.26 formed integral with the end of the operating-rod 19 at the endthereof opposite the handle 20. The said stem 2.6 is externally threadedfor the reception of a clamping-nut 21 which bears against the lower onthe line The inner or lower face of the toured clearance-recess 28 whichmerges into a similarly-contoured clearance-recess 38 formed in the endof the stem 26 of the operating-rod IQ, for purposes as will hereinafterappear.

Normally located within the inner cap I6 is a cup-shaped contractor 3|comprising a flange 32 and an end or bottom wall 33. Formed in theend-wall 33 of the said contractor is a central clearance-opening 34having a diameter very materially larger than the diameter of theoperating-rod 9 to permit lateral movement of the said contractor withrespect to the said operating-rod IS. The diameter of the flange 32 ofthe contractor 3| is proportioned to have a snug fit within the interiorof the tubular side-wall or body 35 of a cylindrically-contoured sealedpackage generally designated by the reference character 35 and shown inFigs. 2, 3 and 10. The said package 36, in addition to its tubular body35, includes end-caps 31 and 38 respectively located at the oppositeends of the said body. The package 36 may be composed of any suitableairtight material such, for instance, as synthetic resin. Preferably,the diameter of the package 36 is such as to snugly fit the interior ofthe barrel or body l5.

Adjacent its lower end (as viewed in the drawings) the contractor 3| isformed upon its outer periphery with an annular sealing-abutment 38which is adapted, under conditions as will hereinafter appear, to havesealing engagement with the upper Or inner edge of the body or side-wall35 of the package 36. The said sealing-abutment may be convenientlyproduced by spinning or otherwise outwardly deflecting, the metal of theflange 32. On its edge the flange 32 is formed with a cutting-nib 48which may be produced by first providing the said flange with a radialperforation 4| and then deflecting the adjacent metal outwardly to formthe said cutting-nib by means of a tool inserted into the saidperforation.

The outer cap H has staked or otherwise rigidly centrally securedthereto, an outlet-nipple 42 extending both interiorly and exteriorly ofthe said cap. The portion of the outlet-nipple 42 extending exteriorlyof the cap is externally threaded for the reception of aninternallythreaded coupling 43 rigidly attached to the inner end of 'aflexible metallic hose 44.

The outer end of the metallic hose 44 is provided with an outlet-fitting45 having an outer portion of tapering form. The said outlet-fitting 45is formed at its extreme outer end with external threads 46 adapting thefitting to be threadedly connected to another fitting or to a spark-plugaperture or the like.

Returning now to the outlet-nipple 42, it will be noted that the saidnipple is formed on its upper or inner end with an integral outlet-stud41 of a pointed character and having two diametricallyopposite ports48-48. The two ports 48-48 just referred to communicate with an axialpassage 49 in the outlet-nipple 42, so that material may flow fromwithin the body outwardly into the coupling 43 and thence through thehose 44 and out through the outlet-fitting 45 to the desireddestination.

purposes as will hereinafter appear. Placed over the anchoring-plate 58is a ring-like sealing-pad 52 which may be formed of leather or othersuitable resilient material.

The said sealing-pad is suitably perforated to permit theanchoringprongs til -5| of the anchoring-plate 58 to extend upwardlytherethrough, as is clearly shown in Figs. 2 and 3.

A preferred mode of loading the device with packaged viscous or plasticmaterial and of expelling the said material therefrom will now bedescribed.

The unit comprising the features l6 and I8 to 3| inclusive may first bedetached from the body of barrel |5 of the device by unthreading theinner cap l6 therefrom. The operating-rod I-9 may now (if not previouslydone) be backed-up with reference to the cap is until the features P9 to3| inclusive assume, with respect to each other, substantially therelationships shown in Fig. 2. In Fig. 2 it will be noted that thecupwasher 24 has been drawn up inside of the contractor 3|, so that thediameter of the said cupwasher is materially reduced against the tensionof the expander 25. A sealed package such as 36, may now be insertedinto the body or barrel |5 through the now-open upper or inner endthereof. The unit comprising the features l8 and M3 to 3| inclusive maynow be reassembled with the body or barrel |5 by partially threading theinner cap i6 onto the said body, as is illustrated in Fig. 2.

A further threading-on of the cap IE will cause the cutting-nib 40 ofthe contractor 3| to engage with the end-wall 31a of the inner or uppercap 31 of the package 36. In the process of further threading the cap l6onto the body l5, the contractor 3| will be caused to turn therewith,thus causing the cutting-nib 40 to sever the end-wall 31a of the cap 31of the package. The rotation of the normally-floating contractor 3|to'efiect the movement of the cutting-nib 40 will be caused by thepinching of the end-wall 33 of the contractor between theclamping-washer 23 and the end-wall of the cap 5, as well as by thefrictional engagement of the skirt of the cup-washer 24 with theinterior of the said contractor.

The downward or outward pressure exerted upon the package 36 by thecutting action of the cutting-nib 48, will partially, at least, forcethe said package downwardly so that the outlet-stud 41 and theanchoring-prongs 5 |-5| penetrate the end-wall 38a of the outer cap 38of the said package. The engagement of the lower or outer cap 38 withthe anchoring-prongs 5|5| will hold the package 36 against rotationwithin the body or barrel J5 as the cutting-nib 40 performs its functionof cutting out the end-wall 31a of the upper or inner cap 31.

Ultimately, in the operation of threading-on the inner cap IS, theend-wall 31a, of the cap 31 of the package will be completely severed(and forced partially into the hollow interior of the feeding-head 2|).Shortly after the cutting-nib 48 has completed its task, the lowerportion of -ment with the cutting-nib 40.

by the outlet-stud 41 and the anchoring-prongs .5,I-.5 I, and the saidcap.38 will be, brought into sealing-engagement with the sealing-pad 52,all as shown in 3.

Nowby turning the operating-rod I 9 by means grits-handle 20, thefeeding-head 2I will be caused ,to ride out of the contractor 3|smoothly into the interior of the packageifi. Upon emergence fromthelower end of the contractor 3 I, the cup-washer 24 will immediatelyex-pand under the action of the expander .25 and the lower beleved-edgeof .the said cup-washer will ride along the inner suriacelof the bodyorside-wall 35 of the package 33.

.The continued downward or-outward movement .or .the. feeding-head 2Iwill cause the viscous or plastic material within the said package toflow laterally .into the axial passage 49 of the outletnipple 42 throughthe complemental ports 48- '48. Erom theinterior of the outlet-nipple42, the material will be forced downwardly through the flexible metallichose and out through the outlet=fitting 4.5 to the desired location.

' When the. feeding-headzl reaches the limit of its downward movement,the outlet-stud 41 will be accommodated within .the clearance-recess 29in the clamping-nut 21 and the clearance-recess .39 .in the stem'ZIi ofthe operating-rod I9, thus avoiding injury to the said outlet-stud.

In lieu of the procedure above described for inserting and opening apackage of sealed viscous or plastic material, a reverse operation maybe performed, though such procedure is not recommended over theprocedure first described.

In the reverse procedure, the unit comprising the parts IE to 3|inclusive might be fully ap plied to the upper or'inner end of thebarrel or body I and the lower or outer cap I! removed to permit theinsertion of the package 36 or its equivalent into the said body. Now byscrewing the lower or outer cap I! back onto-the body I5, theoutlet-stud 41 and the anchoring-prongs 5I--5I would be engaged with theend-wall 38a of the outer cap 38 of the said package.

By continuing to thread the lower or outer cap I I on to the body I5,the package 36 would be rotated and ultimately brought into engage- Thecontinued threading-on of the cap I! would ultimately effeet theseverance of the end-wall 31a of the cap 31 of the package, so that theejection of the contents of the package could be effected in a mannersimilar to that previously described. This second procedure is notrecommended, however, mainly for the reason that the peripheral surfacesof the. body or side-wall 35 of the package 36 would normally causeexcessive friction with the inner periphery of the body or barrel I5 ofthe device, thus making the operation unduly difficult.

It is to be borne in mind that in many instances certain plastic orsemiliquid materials deteriorate during storage or transportation if airand moisture are given access thereto. By way of example, the plasticsealing-and-insulating compound now commonly used in the interiors ofaircraft spark plugs are of such character as require protection fromboth .air and moisture.

By means of the present invention, .a sealed package of plastic orviscous material may remai sealed during its insertion into the devicedescribed until such time as it is desired to expel the contents of suchsealed package and inject the same into a spark plug or other device.The user may then, in efiect, open the package while the same is withinthe device and proceed smoothly and effectively to inject the same intothe desired location without theap-preciable entrapment of air ormoisture.

The invention may be carried out in other specific ways than thoseherein set forth without departing fromthe spiritand essentialcharacter'- istics of the invention, and the present embodiments are,therefore, to be considered in all respects as illustrative and notrestrictive, and all changes coming within the meaning and-equiva lencyrange of the appended claims are intended to be embraced therein.

I claim:

l. A device for injecting viscous material, in-- cluding in combination:.a tubular body constructed and arranged to receive a package of viscousmaterial and having opposite end-walls, at least one of .the saidend-walls being removable from the said tubular body to permit theintroduction thereinto of a package of viscous material; anoperating-rod extending through one end-wallof the said tubular body; afeeding-head carried by the .said operating-rod at a location within thesaid body and having a laterally-contractible portion adapted to fitwithin the said package; a. laterally floating cup-shaped contractorlocated intermediate the said feedinghead and the end-wall of the saidbody through which the said operating-rod extends and having an externaldiameter smaller than the internal diameter of the said tubular body tothus permit the said contractor to float laterally therein, the saidcup-shaped contractor having an end-wall centrally apertured to receivewith freedom for lateral movement the said operating-rod, th saidcontractor having a substantially-annular flange projecting from thesaid end-wall and constructed and arranged to engage with and contractthe laterally-contractible portion of the said feeding-head when thelatter is retired toward the end-wall of the body through which the saidoperating-rod extends; and a cutter carried by the substantially-annularflange of the said contractor and constructed and arranged to cutthrough the end-wall of a package contained within the said body whenrelative movement takes place between the said contractor and the saidpackage. I

2. A device for injecting viscous material, including in combination: atubular body constructed and arranged to receive a package of viscousmaterial and having opposite end-walls, at least one of the saidend-walls being removable from the said tubular body to permit theintroduction thereinto of a package of viscous material; anoperating-rod extending through one end wall of the said tubular body; afeedinghead carried by the said operating rod at a location within thesaid body and having a laterallycontractible portion adapted to fitwithin the said package; a cup-shaped contractor within the said tubularbody and having an end-wall and a substantially-annular flangeprojecting therefrom, the said flange being constructed and arranged tofit within the said package and engage with and contract thelaterally-contractible portion of the said feeding-head when the latteris retired toward the end-wall of the body through which the saidoperating-rod extends; a cutter carried by the substantially-annularflange of the said contractor and constructed and arranged to cutthrough the end-wall of a package contained within the said body whenrelative movement takes place between the said contractor and the saidpackage; and a sealing-abutment carried on the exterior periphery of theflange of the said contractor in position to engage with the end of thepackage through which the said cutter has penetrated.

3. A device for injecting viscous material, including in combination: atubular body constructed and arranged to receive a package of viscousmaterial and having opposite end-walls, at least one of the saidend-walls being removable from the said tubular body to permit theintroduction thereinto of a package of viscous material; anoperating-rod extending through one end-wall of the said tubular body; afeeding-head carried by the said operating-rod at a location within thesaid body and having a laterally-contractible portion adapted to fitwithin the said package; a laterally-floating cup-shaped contractorlocated intermediate the said feedinghead and the end-wall of the saidbody through which the said operating-rod extends and having an externaldiameter smaller than the internal diameter of the said-tubular body tothus permit the said contractor to float laterally therein, the saidcup-shaped contractor having an end-wall centrally apertured to receivewith freedom for lateral movement the said operating-rod, the saidcontractor having a substantially-annular flange projecting from thesaid end-wall and constructed and arranged to engage with and contractthe laterally-contractible portion of the said feeding-head when thelatter is retired toward the end-wall of the body through which the saidoperating-rod extends; a cutter carried by the substantially-annularflange of the said contractor and constructed and arranged to cutthrough the nd-Wall of a package contained within th said body whenrelative movement takes place between the said contractor and the saidpackage; and a sealing-abutment carried by th flange of the saidcontractor in position to engage with the end of the package throughwhich the said cutter has penetrated.

4. A device for injecting viscous material, including in combination: atubular body constructed and arranged to receive a package of viscousmaterial and having opposite end-walls, at least one of the saidend-walls being removable from the said tubular body to permit theintroduction thereinto of a package of viscous material; anexternally-threaded operating-rod threadedly connected to and extendingthrough one end-wall of the said tubular body; a feedinghead carried bythe said operating-rod at a location within the said body and having alaterallycontractible portion adapted to fit within the said package; acontractor within the said tubular body and constructed and arranged tocontract the laterally-contractible portion of the said feeding-headwhen the latter is retired toward the end-wall of the said body throughwhich the said operating-rod extends; a cutter carried by the saidcontractor and constructed and arranged to cut through the adjacentend-wall of a package contained within the said body when relativemovement takes place between the said contractor and the said package;and anchor-means carried by the end-wall of the said tubular body whichis opposite the end-wall through which the said operating-rod extends,the said anchormeans being constructed and arranged to engage with theend-wall of the said package opposite the end-wall with which the saidcutter engages.

JOHN A. IVIU'RNANE.

